CA1258930A - Active impedance line feed circuit - Google Patents

Active impedance line feed circuit

Info

Publication number
CA1258930A
CA1258930A CA000526332A CA526332A CA1258930A CA 1258930 A CA1258930 A CA 1258930A CA 000526332 A CA000526332 A CA 000526332A CA 526332 A CA526332 A CA 526332A CA 1258930 A CA1258930 A CA 1258930A
Authority
CA
Canada
Prior art keywords
tip
amplifier
ring
circuit
voltage taps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000526332A
Other languages
English (en)
French (fr)
Inventor
Reinhard Rosch
Stanley D. Rosenbaum
Calvin Plett
Zdenek Holy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000526332A priority Critical patent/CA1258930A/en
Priority to US07/068,686 priority patent/US4764956A/en
Priority to DE8787310286T priority patent/DE3783348T2/de
Priority to EP87310286A priority patent/EP0272800B1/de
Priority to AT87310286T priority patent/ATE84178T1/de
Priority to JP62317679A priority patent/JPS63169865A/ja
Priority to CN87101278A priority patent/CN1009897B/zh
Application granted granted Critical
Publication of CA1258930A publication Critical patent/CA1258930A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA000526332A 1986-12-24 1986-12-24 Active impedance line feed circuit Expired CA1258930A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA000526332A CA1258930A (en) 1986-12-24 1986-12-24 Active impedance line feed circuit
US07/068,686 US4764956A (en) 1986-12-24 1987-07-01 Active impedance line feed circuit
DE8787310286T DE3783348T2 (de) 1986-12-24 1987-11-20 Leitungsspeiseschaltung mit aktiver impedanz.
EP87310286A EP0272800B1 (de) 1986-12-24 1987-11-20 Leitungsspeiseschaltung mit aktiver Impedanz
AT87310286T ATE84178T1 (de) 1986-12-24 1987-11-20 Leitungsspeiseschaltung mit aktiver impedanz.
JP62317679A JPS63169865A (ja) 1986-12-24 1987-12-17 有効インピーダンス・ライン・フイード回路
CN87101278A CN1009897B (zh) 1986-12-24 1987-12-24 有源阻抗用户线馈电电路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000526332A CA1258930A (en) 1986-12-24 1986-12-24 Active impedance line feed circuit

Publications (1)

Publication Number Publication Date
CA1258930A true CA1258930A (en) 1989-08-29

Family

ID=4134644

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000526332A Expired CA1258930A (en) 1986-12-24 1986-12-24 Active impedance line feed circuit

Country Status (7)

Country Link
US (1) US4764956A (de)
EP (1) EP0272800B1 (de)
JP (1) JPS63169865A (de)
CN (1) CN1009897B (de)
AT (1) ATE84178T1 (de)
CA (1) CA1258930A (de)
DE (1) DE3783348T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0671295B2 (ja) * 1987-04-06 1994-09-07 沖電気工業株式会社 加入者線給電回路
US4941063A (en) * 1988-03-04 1990-07-10 Oneac Corporation Telephone lines overvoltage protection apparatus
US5052039A (en) * 1990-01-16 1991-09-24 Northern Telecom Limited Line interface circuit
EP0455894B1 (de) * 1990-05-11 1996-01-17 BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap Impedanz-Synthese durch vielfache Schleife, die filternde Mittel verwendet
US5202919A (en) * 1990-09-04 1993-04-13 Tollgrade Communications, Inc. Metallic channel unit network
US5586181A (en) * 1990-09-04 1996-12-17 Tollgrade Communications, Inc. Metallic channel unit network
US5457743A (en) * 1990-09-04 1995-10-10 Tollgrade Communications, Inc. Metallic channel unit network
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
US5661794A (en) * 1992-04-16 1997-08-26 Northern Telecom Limited Telephone line interface circuit with voltage control
JP3322889B2 (ja) * 1991-03-19 2002-09-09 株式会社東芝 給電伝送システム
US5359655A (en) * 1991-06-06 1994-10-25 U.S. Philips Corporation Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances
US5258713A (en) * 1992-04-16 1993-11-02 Northern Telecom Limited Impedance generator for a telephone line interface circuit
US5274702A (en) * 1992-04-16 1993-12-28 Northern Telecom Limited Wideband telephone line interface circuit
US5329585A (en) * 1992-11-30 1994-07-12 Motorola, Inc. Subscriber line interface circuit for controlling AC and DC output impedance
DE69405442T2 (de) * 1993-03-18 1998-04-02 Hyundai Electronics America Übertragungsempfängerschaltkreis für eine integrierte Schaltung
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning
US5528688A (en) * 1994-09-28 1996-06-18 At&T Corp. Telephone battery feed circuit including noise reduction circuit
CA2289397A1 (en) 1999-11-12 2001-05-12 Jonathan Kwan A low insertion loss current sense circuit for line cards
US6489755B1 (en) * 2000-09-18 2002-12-03 Adtran, Inc. Active ripple and noise filter for telecommunication equipment powering
US6678132B1 (en) * 2002-09-06 2004-01-13 Bae Systems Controls, Inc. Ground fault detection system
US7249676B2 (en) * 2003-08-07 2007-07-31 Tg Tools United Company Packaging, storage and display apparatus and system
US8319466B2 (en) * 2011-02-21 2012-11-27 Rockwell Automation Technologies, Inc. Modular line-to-ground fault identification
US8710825B2 (en) * 2011-02-23 2014-04-29 General Electric Company Method and system of a sensor interface having dynamic automatic gain control
US9860392B2 (en) 2015-06-05 2018-01-02 Silicon Laboratories Inc. Direct-current to alternating-current power conversion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476350A (en) * 1981-02-17 1984-10-09 Bell Telephone Laboratories, Incorporated Battery feed circuit
CA1182230A (en) * 1982-12-17 1985-02-05 Patrick R. Beirne Subscriber line interface circuit
US4571460A (en) * 1984-03-12 1986-02-18 Northern Telecom Limited Active impedance line feed circuit with improved ground fault protection
US4612417A (en) * 1984-07-27 1986-09-16 At&T Bell Laboratories Electronic battery feed circuit for telephone systems

Also Published As

Publication number Publication date
US4764956A (en) 1988-08-16
JPS63169865A (ja) 1988-07-13
EP0272800A2 (de) 1988-06-29
DE3783348D1 (de) 1993-02-11
ATE84178T1 (de) 1993-01-15
EP0272800B1 (de) 1992-12-30
DE3783348T2 (de) 1993-04-22
CN1009897B (zh) 1990-10-03
EP0272800A3 (en) 1990-03-28
CN87101278A (zh) 1988-07-06

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Legal Events

Date Code Title Description
MKEX Expiry